html,body,div,ul,ol,li,dl,dt,dd,h1,h2,h3,h4,h5,h6,pre,form,p,blockquote,fieldset,input
{
    margin: 0;
    padding: 0;
}
body {
    width:100%;
    height:100%;

}
.mainContainer {
    width:960px;
    height:100%;
    background:red;
    margin-left:auto;
    margin-right:auto;

}
.article {
    height:200px;
    background:blue;
    padding:10px;

}
